#include <GL/glut.h>

void myDisplay()
{
  glClear(GL_COLOR_BUFFER_BIT);
  glColor3f (0,0,1);
  glBegin(GL_POLYGON);
    glVertex2f (0.0, 0.0);
    glVertex2f (0.2, 0.0);
    glVertex2f (0.2, 0.5);
  glEnd();

  glFlush();
}

int main (int argc, char ** argv)
{
  glutInit (&argc,argv);
  glutCreateWindow("Iste ilk pencerem!");
  glutDisplayFunc(myDisplay);
  glutMainLoop();
  return(0);
}

#include <GL/glut.h>

void display(void)
{
  glClear(GL_COLOR_BUFFER_BIT);

  glColor3f(1,1,1);// white
  glEnable(GL_LINE_STIPPLE);
  glLineStipple (2, 0x0C0F);
  glBegin(GL_LINE_STRIP);
    glVertex2f(0,-1);
    glVertex2f(0,1);
  glEnd();

glFlush();
}

int main(int argc, char **argv)
{
  glutInit(&argc, argv);
  glutCreateWindow("Kesik Cizgi");
  glutDisplayFunc(display);
  glutMainLoop();
  return(0);
}

#include <GL/glut.h>
#include <math.h>
#include <stdio.h>

#define RADIUS 0.75

void cember(void);

int main(int argc, char ** argv)
{
  glutInit(&argc, argv);
  glutCreateWindow("Cember");
  glutDisplayFunc(cember);
  glutMainLoop();
  return(0);
}

void cember(void)
{
  double x,y;
  int i;

  glClearColor(1.0,1.0,0.0,0.0);
  glClear(GL_COLOR_BUFFER_BIT);
  glColor3f(0,0,1);// blue

  glPointSize(10.0);
  glBegin(GL_POINTS);
    for(i = 1; i < 360; i++){
      x = RADIUS * sin(((double)i)*M_PI/180);
      y = RADIUS * cos(((double)i)*M_PI/180);
      #ifdef DEBUG
        fprintf(stderr, "(%f, %f)\n", x, y);
      #endif
      glVertex2f(x,y);
    }
  glEnd();

  glFlush();
}

#include <GL/glut.h>
#include <math.h>

void RenkliCiz(void);

#define RADIUS 0.75

int main(int argc, char **argv)
{
  glutInit(&argc, argv);
  glutCreateWindow("Renkli Cizgi");
  glClearColor (0.1, 0.1, 0.1, 0.0);
  glutDisplayFunc(RenkliCiz);
  gluOrtho2D (-5.0, 5.0, -5.0, 5.0);
  glutMainLoop();
  return(0);
}

void RenkliCiz (void)
{
  int i, j, k, tur;
  double x, y;
  int teta=0;

  glClear(GL_COLOR_BUFFER_BIT);
  glPointSize(12.0);
  glBegin(GL_POINTS);
    for(i = 0; i <= 10; i++){
      for(j = 0; j <= 10; j++){
        for(k = 0; k <= 10; k++){
          glColor3f (i*0.1, j*0.1, k*0.1);
          x = teta; y = x;
          #ifdef DEBUG
            fprintf(stderr, "teta: %d, Color: %f, %f, %f; (%f, %f)\n",
                    teta, i*0.1, j*0.1, k*0.1, x,y);
          #endif
          tur = teta/360;
          x = RADIUS*(tur+1)*sin(((double)(teta-tur*360))*M_PI/180);
          y = RADIUS*(tur+1)*cos(((double)(teta-tur*360))*M_PI/180);
          glVertex2f(x,y);

          teta++;
        }
      }
    }
  glEnd();

  glFlush();
}

#include <GL/glut.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <math.h>
#include <stdio.h>

#define RADIUS 0.75

#define X0 -1
#define Y0 -1
#define X1 1
#define Y1 1


void cember (void);
void dondur (unsigned char ,int, int);

int teta;
int viewX0, viewY0, viewX1, viewY1;

int
main(int argc, char **argv)
{
  printf("Kullanim sekli:\n");
  printf("a: sol,          d: sag,         s: asagi,      w: yukari\n");
  printf("u: yukari cevir, n: asagi cevir, h: sola cevir, j: saga cevir\n");
  printf("b: duzlemde sola dondur,         m: duzlemde saga dondur\n");
  printf("-: goruntuyu kucult,             +: goruntuyu buyut\n");
  printf("r: goruntuyu ilk duruma getir, ESC: Cikis\n");

  teta=0;
  viewX0 = -2; viewX1 = 2; viewY0 = -2; viewY1 = 2;
  glutInit(&argc, argv);
  glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB);
  glutCreateWindow("Kare & Cember");

  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  gluOrtho2D(viewX0, viewX1, viewY0, viewY1);

  glutDisplayFunc(cember);
  glutKeyboardFunc(dondur);
  glutMainLoop();
  return(0);
}

void cember(void)
{
  double x, y;
  int i;

  glClearColor(0.0, 0.0, 0.0, 0.0);
  glClear(GL_COLOR_BUFFER_BIT);

  glColor3f(1, 1, 1);// blue

  glBegin(GL_POINTS);
    for(i = 1; i < 360; i++){
      x = RADIUS * sin(((double)i) * M_PI / 180);
      y = RADIUS * cos(((double)i) * M_PI / 180);
      glVertex2f(x, y);
    }
  glEnd();

  glColor3f(1, 1, 1);// white
  glEnable(GL_LINE_STIPPLE);
  glLineStipple (2, 0x0C0F);
  glBegin(GL_LINE_STRIP);
    glVertex2f(0, -1);
    glVertex2f(0, 1);
  glEnd();
  glBegin(GL_LINES);
    glVertex2f(-1, 0);
    glVertex2f (1, 0);
  glEnd();

  glColor3f(1.0, 1.0, 1.0);

  glRectf(-0.5, -0.5, 0.5, 0.5);
  glBegin(GL_LINES);
    glVertex2f(-1, 0);
    glVertex2f (1, 0);
  glEnd();

  glutSwapBuffers();
}

void dondur (unsigned char tus, int x, int y)
{
  if (tus == 'd'){
   glTranslatef (1.0, 0.0, 0.0);
  } else if (tus == 'a'){
     glTranslatef (-1.0, 0.0, 0.0);
  } else if (tus == 'w'){
     glTranslatef (0.0, 1.0, 0.0);
  } else if (tus == 's'){
     glTranslatef (0.0, -1.0, 0.0);
  } else if (tus == 'u'){
     glRotatef(15,1.0, 0.0, 0.0);
  } else if (tus == 'n'){
     glRotatef(15,-1.0, 0.0, 0.0);
  } else if (tus == 'h'){
     glRotatef(15, 0.0, 1.0, 0.0);
  } else if (tus == 'j'){
     glRotatef(15, 0.0, -1.0, 0.0);
  } else if (tus == 'b'){
     glRotatef(15, 0.0, 0.0, 1.0);
  } else if(tus == 'm'){
     glRotatef(15, 0.0, 0.0, -1.0);
  } else if (tus == '+'){
     glScalef(1.5, 1.5, 1.5);
  } else if (tus == '-'){
     glScalef(0.5, 0.5, 0.5);
  } else if (tus == 'r'){
     glLoadIdentity();
  } else if (tus == 27){
     exit(0);
  }
  cember();
}